This signature file may be used to cryptographically verify file integrity, like this:: $ gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys 0xA16EB94D $ gpg --list-keys 0xA16EB94D pub 2048R/A16EB94D 2008-08-15 [expires: 2023-08-12] uid Turnkey Linux Release Key $ gpg --verify debian-6-turnkey-simpleinvoices_12.0-1_i386.tar.gz.sig gpg: Signature made Tue Aug 21 14:40:57 UTC 2012 using RSA key ID A16EB94D gpg: Good signature from "Turnkey Linux Release Key For your convenience we also include file checksums: * sha1sum a4c605566442d7d2966a66cff76f730cda7e661b * md5sum a215dc94551dab1ba52e79956cd846ed You can calculate these on your end and compare to check for errors, but cryptographic verification is recommended for security reasons. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAABAgAGBQJQM53wAAoJEIXCXpWhbrlNUlQIAMcOYCAJ0yE6Y1VU89Cu02TF GW5yvl56sWwbRB+4kW6EiTSsFl8sbyfX/QhdWl0RucTJsqhZV81dh0MViF9rJe5r WzrafqPu4odyzdOWXOfCo0inv2axQfCVnwM01ntNeTY7zhtMF7hac2d9G1+vAXDN 9yrGB3+edzp1XSAu36/8Pr/mp5UNJktv19Q7SqLous9HJBz72DVysrK4T6YQz+u5 MWbqRTyGFshg8zNW5X/YI96140WY7oarNKJCzzDaFfhRWO4gms3wRE+qwER/5CDz vbdtsfOVe0Hb67IFXJg5h+8uyahke8lbw6OGk0RVWgfYlPUZsCxf0rwKNBBqwNE= =MufJ -----END PGP SIGNATURE-----